One of the main mechanisms to increase star formation activity is through galaxy interactions. Tidal induced inflows of metal-poor material are responsible of this enhancement, which in turns are thought to be the driver of metallicity dilution observed in central regions of interacting galaxies. Thanks to the spatially resolved data from 103

The pyramids of Egypt, notably those of the 4th Dinasty as Giza, have always be considered an unmistikable part of human world heritage as the only surviving wonders of the Ancient World. Their majesty, technical hability and innovative character have always beeen considered as representative of ancient Egyptian ingenuity. However, past and present

Aims: We present a new calibration of the calcium II triplet equivalent widths versus [Fe/H], constructed upon K giant stars in the Galactic bulge. This calibration will be used to derive iron abundances for the targets of the GIBS survey, and is in general especially well suited for solar and supersolar metallicity giants, which are typical of

Massive stars in young massive clusters insert tremendous amounts of mass and energy into their surroundings in the form of stellar winds and supernova ejecta. Mutual shock-shock collisions lead to formation of hot gas, filling the volume of the cluster. The pressure of this gas then drives a powerful cluster wind. However, it has been shown that

We investigate the internal structure and density profiles of haloes of mass 1010-1014 M⊙ in the Evolution and Assembly of Galaxies and their Environment (EAGLE) simulations. These follow the formation of galaxies in a Λ cold dark matter Universe and include a treatment of the baryon physics thought to be relevant. The EAGLE simulations reproduce

We present measurements of internal proper motions at more than five hundred positions of the Eskimo Nebula (NGC 2392), based on images acquired at two epochs with WFPC2 on board the Hubble Space Telescope (the two epochs are separated by 7.695 yr). A detailed comparison of the two observations clearly shows the expansion of the nebula. We measured